@article{58200d04ae204b6bbbb529a54aafedc4,
title = "There are 270,474,142 nonisomorphic 2-(9,4,6) designs",
keywords = "automorphism group, BIBD, orderly algorithm, automorphism group, BIBD, orderly algorithm, automorphism group, BIBD, orderly algorithm",
author = "P.R.J. {\"O}sterg{\aa}rd",
year = "2001",
language = "English",
volume = "37",
pages = "173--176",
journal = "Journal of Combinatorial Mathematics and Combinatorial Computing",
publisher = "Charles Babbage Research Centre",
number = "1",
}